condition	mean	min	max
4 h after light	7.842086666666667	7.58695	8.21062
8 h after light	7.82634	7.57175	8.1189
12 h after light	7.987443333333332	7.696219999999999	8.390839999999999
4 h after dark	7.889973333333333	7.615189999999999	8.1961
8 h after dark	7.94565	7.592739999999999	8.47147
12 h after dark	7.824456666666666	7.6517100000000005	8.08372